2024 Consumer Confidence Report

Water System Information

Water System Name: Averydale Mutual Water Company

Report Date: 6/27/2025

Type of Water Source(s) in Use: Groundwater

Name and General Location of Sou rce(s): Well #1 & Well #5 45404 30th St E, Lancaster, CA 93535

Well #3 & Well #4 3659 E Avenue Lancaster, CA 93535

Drinking Water Source Assessment Information: Clinical Laboratory of San Bemardino and

Antelope Valley East Kern

Time and Place of Regularly Scheduled Board Meetings for Public Participation: Third Tuesday of every month at 7:00pm at 3659 E Avenue H-4 Lancaster, CA 93535

For More Information, Contact: Anna Riquelme (661 ) 946-2256

About This Report

We test the drinking water quality for many constituents as required by state and federal regulations. This report shows the results of our monitoring for the period of January 1 to December 31 , 2024, and may include earlier monitoring data.

Importance of This Report Statement in Five Non-English Languages (Spanish, Mandarin, Tagalog, Vietnamese, and Hmong)

Language in Spanish: Este informe contiene infomaciön muy importante sobre su agua para beber. Favor de comunicarse [Enter Water System's Name] a [Enter Water System's Address or Phone Numberl para asistirlo en espafiol.

Water

System's

Address][Enter

Water

System's

Language in Mandarin: [Enter

Water System

Phone Number].

Language in Tagalog: Ang pag-uulat na ito ay naglalaman ng mahalagang impormasyon tungkol sa inyong inuming tubig. Mangyaring makipag-ugnayan sa [Enter Water System's Name and Address] o tumawag sa [Enter Water System's Phone Number] para matulungan sa wikang Tagalog.

Language in Vietnamese: Båo cåo nåy chlfra thöng tin quan trong vé nuöc uöng cüa ban. Xin vui löng lién he [Enter Water System's Name] tai [Enter Water System's Address or Phone Number] dé duqc h6 tro giüp bång tiéng Viet.

Language in Hmong: Tsab ntawv no muaj cov ntsiab lus tseem ceeb txog koj cov dej haus. Thov hu rau [Enter Water System's Name] ntawm [Enter Water System's Address or Phone Number] rau kev pab hauv lus Askiv.

Terms Used in This Report

Term

Definition

Level 1 Assessment

A Level 1 assessment is a study of the water system to identify potential problems and determine (if possible) why total coliform bacteria have been found in our water system.

Level 2 Assessment

A Level 2 assessment is a very detailed study of the water system to identify potential problems and determine (if possible) why an E coli MCL violation has occurred and/or why total coliform bacteria have been found in our water system on multiple occasions.

Maximum Contaminant Level (MCL)

The highest level of a contaminant that is allowed in drinking water. Primary MCLs are set as close to the PHGs (or MCLGs) as is economically and technologically feasible. Secondary MCLs are set to protect the odor, taste, and appearance of drinking water.

Maximum Contaminant Level Goal (MCLG)

The level of a contaminant in drinking water below which there is no known or expected risk to health. MCLGs are set by the U.S. Environmental Protection Agency (U.S. EPA).

Maximum Residual

Disinfectant Level

(MRDL)

The highest level of a disinfectant allowed in drinking water. There is convincing evidence that addition of a disinfectant is necessary for control of microbial contaminants.

Maximum Residual Disinfectant Level Goal

(MRDLG)

The level of a drinking water disinfectant below wh ich there is no known or expected risk to health. MRDLGs do not reflect the benefits of the use of disinfectants to control microbial contaminants.

Primary Drinking Water Standards (PDWS)

MCLs and MRDLs for contaminants that affect health along with their mon itoring and reporting requ irements, and water treatment requ irements.

Public Health Goal (PHG)

The level of a contaminant in drinking water below which there is no known or expected risk to health. PHGs are set by the California Environmental Protection Agency.

Regulatory Action Level (AL)

The concentration of a contaminant which, if exceeded, triggers treatment or other requirements that a water system must follow.

Secondary Drin king

Water Standards (SDWS)

MCLs for contaminants that affect taste, odor, or appearance of the drinking water. Contaminants with SDWSs do not affect the health at the MCL levels.

Treatment Tech nique

A required process intended to reduce the level of a contaminant in drinking water.

Variances and Exemptions

Permissions from the State Water Resources Control Board (State Board) to exceed an MCL or not comply with a treatment technique under certain conditions.

Not detectable at testing limit.

ppm

parts per million or milligrams per liter (mg/L)

ppb

parts per billion or micrograms per liter (pg/L)

ppt

parts per trillion or nanograms per liter (ng/L)

Term

Definition

ppq

parts per quadrillion or picogram per liter (pg/L)

pCi/L

picocuries per liter (a measure of radiation)

Sources of Drinking Water and Contaminants that May Be Present in Source Water

The sources of drinking water (both tap water and bottled water) include rivers, lakes, streams, ponds, reservoirs, springs, and wells. As water travels over the surface of the land or through the ground, it dissolves naturally-occurring minerals and, in some cases, radioactive material, and can pick up substances resulting from the presence of animals or from human activity.

Contaminants that may be present in source water include:

< >Microbial contaminants, such as viruses and bacteria, that may come from sewage treatment plants, septic systems, agricultural livestock operations, and wildlife.Inorganic contaminants, such as salts and metals, that can be naturally-occurring or result from urban stormwater runoff, industrial or domestic wastewater discharges, oil and gas production, mining, or farming.Pesticides and herbicides, that may come from a variety of sources such as agriculture, urban stormwater runoff, and residential uses.Organic chemical contaminants, including synthetic and volatile organic chemicals, that are byproducts of industrial processes and petroleum production, and can also come from gas stations, urban stormwater runoff, agricultural application, and septic systems.Radioactive contaminants, that can be naturally-occu rring or be the result of oil and gas production and mining activities.In order to ensure that tap water is safe to drink, the U.S. EPA and the State Board prescribe regulations that limit the amount of certain contaminants in water provided by public water systems. The U.S. Food and Drug Administration regulations and Califomia law also establish limits for contaminants in bottled water that provide the same protection for public health.

About Your Drinking Water Quality

Drinking Water Contaminants Detected

Tables 1, 2, 3, 4, 5, 6, and 8 list all of the drinking water contaminants that were detected during the most recent sampling for the constituent. The presence of these contaminants in the water does not necessarily indicate that the water poses a health risk. The State Board allows us to monitor for certain contaminants less than once per year because the concentrations of these contaminants do not change frequently. Some of the data, though representative of the water quality, are more than one year old. Any violation of an AL, MCL, MRDL, or TT is asterisked. Additional information regarding the violation is provided later in this report.

Con su

Table 1. Sampling Results Showing the Detection of Coliform Bacteria

Complete if bacteria are detected.

Microbiological Contaminants

Highest No.

Detections

No. of

Months in Violation

MCL

MCLG

Typical Source of

Bacteria

E. coli

(2025)

(a)

Human and animal fecal waste

(a) Routine and repeat samples are total coliform-positive and either is E. coli-positive or system fails to take repeat samples following E. coli-positive routine sample or system fails to analyze total coliform-positive repeat sample for E. coli.

Table 2. Sampling Results Showing the Detection of Lead and Copper

Complete if lead or copper is detected in the last sample set.

Typical Source of Contaminant

Lead

(ppb)

9/21/21

0-15

0.2

Corrosion of household plumbing systems; Erosion of natural deposits

Copper (ppm)

9/21/21

0.050

0-330

1.3

0.3

Internal corrosion of household plumbing systems; erosion of natural deposits; leaching from wood preservatives

Table 3. Sampling Results for Sodium and Hardness

Chemical or

Constituent (and reporting units)

Sample Date

Level Detected

Range of Detections

MCL

(MCLG)

Typical Source of Contaminant

Sodium (ppm)

Well #1

7/18/23

None

Salt present in the water and is generally naturally occurring

Well

7/18/23

None

Salt present in the water and is generally naturally occurin

Well

7/18/23

None

Salt present in the water and is generally naturally occurin

Well #5

7/18/23

None

Salt present in the water and is generally naturally occu rin

Hardness (ppm)

Well #1

7/18/23

None

Sum of polyvalent cations present in the water, enerall ma nesium and

Consu

calcium, and are usually natu rally occu rring

Well #3

7/18/23

130

Sum of polyvalent cations present in the water, generally magnesium and calcium, and are usually naturally occu rring

Well

7/18/23

100

Sum of polyvalent cations present in the water, generally magnesium and calcium, and are usually natu rally occu rring

Well #5

7/18/23

Sum of polyvalent cations present in the water, generally magnesium and calcium, and are usually natu rally occu rring

Consu

Table 4. Detection of Contaminants with a Primary Drinking Water Standard

Chemical or Constituent (and re ortin units

Sample Date

Level

Detected

Range of

Detections

MCL

[MRDL]

PHG

(MCLG)

[MRDLGI

Typical Source of

Contaminant

Nitrate (as N) Well #1

7/16/24

.73

0.06-6.3

Running and leeching from fertilizer use:

leeching from septic tan ks and sewage erosionof natu ral deposits

Nitrate (as N) Well #3

7/16/24

1 .7

0.06-6.3

Running and leeching from fertilizer use:

leeching from septic tan ks and sewage erosionof natu ral deposits

Nitrate (as N) Well

2/20/24

.87

0.06-6.3

Running and leeching from fertilizer use:

leeching from septic tan ks and sewage erosionof natural deposits

Nitrate (as N) Well #5

7/16/24

.74

0.06-6.3

Running and leeching from fertilizer use:

leeching from septic tan ks and sewage erosionof natu ral deposits

Con su

Table 5. Detection of Contaminants with a Secondary Drinking Water Standard

Chemical or

Constituent (and reporting units)

Sample Date

Level

Detected

Range of Detections

SMCL

PHG

(MCLG)

Typical Source of

Contaminant

[Enter

Contaminant]

[Enter

Date]

[Enter

No.]

[Enter

Range]

[Enter

No.]

[Enter

No.]

[Enter Sou rce]

[Enter

Contaminant]

[Enter

Date]

[Enter

No.]

[Enter

Range]

[Enter

No.]

[Enter Sou rce]

[Enter

Contaminant]

[Enter

Date]

[Enter

No.]

[Enter

Rangel

[Enter

No.]

[Enter

No.]

[En ter Sou rce]

Table 6. Detection of Unregulated Contaminants

Chemical or

Constituent (and reporting units)

Sample Date

Level

Detected

Range of

Detections

Notification Level

Health Effects

[Enter

Contaminant]

[Enter

Date]

[Enter

No.]

[Enter

Range]

[Enter No.]

[Enter Language]

[Enter

Contaminant]

[Enter

Date]

[Enter

No.]

[Enter

Range]

[Enter No.]

[Enter Langu age]

[Enter

Contaminant]

[Enter

Date]

[Enter

No.]

[Enter

Range]

[Enter No.]

[Enter Language]

Additional General Information on Drinking Water

Drinking water, including bottled water, may reasonably be expected to contain at least small amounts of some contaminants. The presence of contaminants does not necessarily indicate that the water poses a health risk. More information about contaminants and potential health effects can be obtained by calling the U.S. EPA's Safe Drinking Water Hotline (1-800-4264791 ).

Some people may be more vulnerable to contaminants in drinking water than the general population. Immuno-compromised persons such as persons with cancer undergoing chemotherapy, persons who have undergone organ transplants, people with HIV/AIDS or other immune system disorders, some elderly, and infants can be particularly at risk from infections. These people should seek advice about drinking water from their health care providers. U.S. EPA/Centers for Disease Control (CDC) guidelines on appropriate means to lessen the risk of infection by Cyptosporjdium and other microbial contaminants are available from the Safe Drinking Water Hotline (1-8004264791 ).

Lead-Specific Language: Lead can cause serious health problems, especially for pregnant women and young children. Lead in drinking water is primarily from materials and components associated with service lines and home plumbing. [NAME OF UTILITY] is responsible for providing high quality drinking water and removing lead pipes, but cannot control the variety of materials used in plumbing components in your home. You share the responsibility for protecting yourself and your family from the lead in your home plumbing. You can take responsibility by identifying and removing lead materials within your home plumbing and taking steps to reduce your family's risk. Before drinking tap water, flush your pipes for several minutes by running your tap, taking a shower, doing laundry or a load of dishes. You can also use a filter certified by an American National Standards Institute accredited certifier to reduce lead in drinking water. If you are concerned about lead in your water and

Consumer

wish to have your water tested, contact [NAME OF UTILITY and CONTACT INFORMATION].

Information on lead in drinking water, testing methods, and steps you can take to minimize exposure is available at http:/mww.epa.qov/safewaternead.

Additional Special Language for Nitrate, Arsenic, Lead, Radon, and Cryptosporidium: [Enter

Additional Information Described in Instructions for SWS CCR Document]

State Revised Total Coliform Rule (RTCR): [Enter Additional Information Described in Instructions for SWS CCR Document]

Summary Information for Violation of a MCL, MRDL, AL, T T, or Monitoring and Reporting Requirement

Table 7. Violation of a MCL, MRDL, AL, TT or Monitoring Reporting Requirement

Violation

Explanation

Duration

Actions Taken to Correct Violation

Health Effects Language

[Enter Violation

Type]

[Enter Violation

Explanation]

[Enter Duration]

[Enter Actions

Taken]

[Enter Language]

[Enter Violation

Type]

[Enter Violation

Explanation]

[Enter Duration]

Enter Actions Taken]

[Enter Langu age]

For Water Systems Providing Groundwater as a Source of Drinking Water

Table 8. Sampling Results Showing Fecal Indicator-Positive Groundwater Source Samples

Microbiological

Contaminants

(complete if fecalindicator detected)

Total No. of Detections

Sample Dates

MCL

[MRDL]

PHG

(MCLG)

[MRDLGI

Typical Source of Contaminant

E. coli

None

(0)

Human and animal fecal waste

Enterococci

None

N/A

Human and animal fecal waste

Coliphage

None

Human and animal fecal waste

Summary Information for Fecal Indicator-Positive Groundwater Source Samples, Uncorrected Significant Deficiencies, or Violation of a Groundwater TT

Special Notice of Fecal Indicator-Positive Groundwater Source Sample: [Enter Special Notice of Fecal Indicator-Positive Grou ndwater Source Sample]

Special Notice for Uncorrected Significant Deficiencies: [Enter Special Notice for Uncorrected Sign ificant Deficien cies]

Table 9. Violation of Groundwater TT

Violation

Explanation

Duration

Actions Taken to Correct Violation

Health Effects Language

[Enter Violation]

[Enter Explanation]

[Enter Duration]

[Enter Actions]

[Enter Langu age]

[Enter Violation]

[Enter Explanation]

[Enter Duration]

[Enter Actions]

[Enter Language]

For Systems Providing Surface Water as a Source of Drinking Water

Table 10. Sampling Results Showing Treatment of Surface Water Sources

Treatment Technique (a) (Type of approved filtration technology used)

[Enter Treatment Technique]

Tu rbidity Performance Standards ( b) (that must be met through the water treatment process)

Turbidity of the filtered water must:

— Be less than or equal to [Enter Turbidity Performance

Standard to Be Less Than or Equal to 95% of Measuremene in a Month] N TIJ in 95% of measurements in a month.

— Not exceed [Enter Tu rbidity Performance Standard Not to Be Exceeded for More Than Eight Consecutive Hours] N TU for more than eight consecutive hours. 3 — Not exceed [Enter Tu rbidity Performance Standard Not to Be Exceeded at Any Time] N TU at any time.

Lowest monthly percentage of samples that met Tu rbidity

Performance Standard No. 1.

[Enter No.]

Highest single tu rbidity measurement during the year

[Enter No.]

Number of violations of any surface water treatment requ irements

[Enter No.]

< >A required process intended to reduce the level of a contaminant in drinking water.Turbidity (measured in NTU) is a measurement of the cloudiness of water and is a good indicator of water quality and filtration performance. Turbidity results which meet performance standards are considered to be in compliance with filtration requirements.Summary Information for Violation of a Surface Water TT

Table 11. Violation of Surface Water TT

Violation

Explanation

Duration

Actions Taken to Correct Violation

Health Effects Language

[Enter Violation]

[Enter Explanation]

[Enter Du ration]

[Enter Actions]

[Enter Language]

[Enter Violation]

[Enter Explanation]

[Enter Duration]

[Enter Action s]

[Enter Language]

Summary Information for Operating Under a Variance or Exemption

[Enter Additional Information Described in Instructions for SWS CCR Document]

Summary Information for Revised Total Coliform Rule Level 1 and Level 2 Assessment Requirements

If a water system is required to comply with a Level 1 or Level 2 assessment requirement that is not due to an E. coli MCL violation, include the following information below [22 CCR section 64481 (n)(l

Level 1 or Level 2 Assessment Requirement not Due to an E coli MCL Violation

Coliforms are bacteria that are naturally present in the environment and are used as an indicator that other, potentially harmful, waterborne pathogens may be present or that a potential pathway exists through which contamination may enter the drinking water distribution system. We found colifoms indicating the need to look for potential problems in water treatment or distribution. When this occurs, we are required to conduct assessment(s) to identify problems and to correct any problems that were found during these assessments.

The water system shall include the following statements, as appropriate:

During the past year we were required to conduct [Insert Number of Level 1 Assessments] Level 1 assessment(s). [Insert Number of Level 1 Assessments] Level 1 assessment(s) were completed. In addition , we were required to take [Insert Number of Corrective Actions] corrective actions and we completed [Insert Number of Corrective Actions] of these actions.

During the past year [Insert Number of Level 2 Assessment] Level 2 assessments were requ ired to be completed for our water system. [Insert Number of Level 2 Assessments] Level 2 assessments were completed. In addition, we were required to take [Insert Number of Corrective Actions] corrective actions and we com leted Insert Number of Corrective Actions of these actions.

If the water system failed to complete all the required assessments or correct all identified sanitary defects, the water system is in violation of the treatment technique requirement and shall include the following statements, as appropriate:

During the past year we failed to conduct all of the requ ired assessment(s).

During the past we failed to correct all identified defects that were found during the assessment.

[For Violation of the Total Coliform Bacteria IT Requirement, Enter Additional Information Described in Instructions for SWS CCR Document]

If a water system is required to comply with a Level 2 assessment requirement that is due to an E. coli MCL violation, include the information below [22 CCR section 64481 (n )(2)].

Level 2 Assessment Requirement Due to an E. coli MCL Violation

E coli are bacteria whose presence indicates that the water may be contaminated with human or animal wastes. Human pathogens in these wastes can cause short-term effects, such as diarrhea, cramps, nausea, headaches, or other symptoms. They may pose a greater health risk for infants, young children, the elderly, and people with severely compromised immune systems. We found E. coli bacteria, indicating the need to look for potential problems in water treatment or distribution. When this occurs, we are required to conduct assessment(s) identify problems and to correct any problems that were found during these assessments.

We were required to complete a Level 2 assessment because we found E. coli in our water system. In addition, we were requ ired to take [Insert Number of Corrective Actions] corrective actions and we com leted Insert Number of Corrective Actions of these actions.

If a water system failed to complete the required assessment or correct all identified sanitary defects, the water system is in violation of the treatment technique requirement and shall include the following statements, as appropriate:

We failed to conduct the required assessment.

We failed to correct all sanitary defects that were identified du ring the assessment.

If a water system detects E. coli and has violated the E. coli MCL, include one or more the following statements to describe any noncompliance, as applicable:

We had an E. coli-positive repeat sample following a total coliform positive routine sample.

We had a total coliform-positive repeat sample following an E. coli-positive routine sample.

We failed to take all required repeat samples following an E. coli-positive routine sample.

We failed to test for E. coli when any repeat sample tests positive for total coliform.

[If a water system detects E. coli and has not violated the E. coli MCL, the water system may include a statement that explains that although they have detected E. coli, they are not in violation of the E. coli MCL.]